Update: So I bought the 70-5600 and received it, BUT here's the issue. The part that I bought only connects to the 2 connectors that are already in the car. I'm trying to connect the factory radio to the car. For some reason it does not work, and I'm not sure how to tell what the issue might be. Both opposite ends that connect into the part I bought are both there. So there's 2 ends. One of them fits into the radio (the more square one), but the longer rectangular one doesn't. It basically is just there. From each connect the colored wires that run from them, go up into the car itself. They all meet and are wrapped like it's one cable, and goes way up/down into the dash. So I don't think I need the 70-5600 part that I have since the originals are already there. I just don't know how to tell if it's the radio that's the issue, or one of the connectors, both, or something even totally different.